2018 Mercedes-Benz C 4.0L Petrol · FP18 THG

The most recent DVSA examination on 5 June 2026 returned a clean pass with no advisories or defects recorded, and the preceding three annual tests in 2025, 2024 and 2023 also returned clean passes without any noted issues. This represents four consecutive years of unblemished results, suggesting the vehicle has been maintained to a satisfactory standard in the period since the earlier 2021 failure. The only historical advisory on file is a nearside rear nail in tyre noted in June 2022, which is a minor, transient finding rather than an indicator of mechanical deterioration. Overall, the maintenance trend is stable and consistent, with no escalation of defects or advisories that would suggest progressive wear or neglect. The recorded mileage of 79,211 miles over an eight-year period equates to an annual average of around 9,900 miles, which is broadly typical for a vehicle of this age and segment. There are no conspicuous gaps in the mileage progression that would point to extended periods of standing, nor are there any abrupt jumps that would indicate inconsistent use or potential mileage discrepancies. This level of consistent, moderate usage is generally favourable, as it implies regular operation which tends to preserve drivetrain, suspension and brake functionality, while not imposing the accelerated wear that high-mileage use brings. Mechanical implications remain those of any eight-year-old executive saloon, but the steady accumulation of miles should mean consumables have been renewed in line with wear rather than age alone. Given the absence of any recurring advisories relating to suspension, braking, exhaust or corrosion, physical checks should focus on age-related degradation rather than specific fault patterns. Tyres should be inspected closely for sidewall perishing and cracking, which is common on Mercedes-Benz products of this era even where tread depth remains adequate, and the wheels should be examined for kerb damage. The braking system should be checked at the wheels for seized or binding calipers, particularly on vehicles that may have been parked for extended periods between shorter journeys, and the brake discs inspected for lip corrosion or surface pitting. A test drive should include firm braking from moderate speed to confirm there is no shudder through the steering or pedal, and the suspension should be exercised over broken surfaces to detect any clonks, knocks or excess travel that might indicate worn bushes, drop links or coil springs. Further inspection points appropriate to this age include verification of a recent cambelt or timing chain service interval depending on the engine variant fitted, confirmation that the 12V battery is in good condition and capable of holding charge, and a check of all fluid levels and their service history including engine oil, brake fluid, coolant and automatic transmission fluid where applicable. Brake fluid is hygroscopic and degrades on a calendar basis regardless of mileage, so evidence of renewal within the last two to three years is desirable. The underside should be examined for any oil or coolant seepage, the exhaust system checked for corrosion or blowing joints particularly at the mounting rubbers and flexi sections, and the bodywork inspected for any developing rust, especially around the wheel arches, sills and under the bonnet. Finally, a thorough scan of the vehicle’s electronic systems via a Mercedes-Benz compatible diagnostic tool is recommended to identify any stored fault codes in modules such as the transmission, airbag system or driver assistance systems, which would not appear on a standard MOT but can indicate developing concerns on a premium vehicle of this age.